Don't mention TLS 1.3 in the man page

The man pages for ciphers, s_client and s_server mention the tls1_3
option but it is not implemented in the 1.1.0 branch. Thus remove it to
avoid confusion.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3099)